1879 A Install Guide Rev1 0 .pdf
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1879-A Throttle Position Sensor
2002-2006 Acura RSX Type S
2002-2005 Honda Civic Si
2002-2006 JDM Honda Integra Type R
IMPORTANT: The instructions below are meant as a rough outline of the installation procedure, not a
comprehensive installation manual. Only qualified technicians should attempt installation. ACUITY LLC
assumes no liability for issues arising from improper installation.
STEP 1 - UNPLUG WIRING HARNESS
Unplug the wiring harness from your existing TPS
STEP 2 - REMOVE EXISTING TPS
If you are replacing an aftermarket TPS, use a screwdriver or allen wrench (as appropriate) to remove the
two bolts holding it in place.
If you are replacing your original Honda or Acura TPS, you cannot simply unscrew the bolts holding it in
place. The easiest way to remove the screws is to slot them using a thin cut-off blade in a dremel or similar
rotary tool. With a slot cut, a flat head screwdriver can be used to unscrew the 2 bolts.
STEP 3 - REMOVE EXISTING GASKET
With the old TPS removed, make sure that the gasket is also removed. The OEM and aftermarket gaskets
are typically made from a green or blue paper-like material. This will not be needed when using the ACUITY
hall effect tps since it is designed to seal using an integral o-ring seal. It is not uncommon for the original
paper gaskets to stick to the throttle body during removal. A razor may be used to clean off any pieces of
the gasket that stick to the throttle body.
STEP 4 - INSTALL THE ACUITY TPS
Bolt the ACUITY TPS to the throttle body using the two supplied phillips head bolts. Leave the bolts loose
enough to allow the TPS to rotate when turned gently by hand.
STEP 5 - PLUG IN WIRING HARNESS
Plug the TPS connector from the wiring harness to the ACUITY TPS.
STEP 6 - CALIBRATE THE ACUITY TPS
For those cars equipped with a HONDATA K-Pro or similar standalone ECU, please remember to check
TPS calibration in your tuning software after installation.
The ECU expects to see a voltage of between 0.48V and 0.5V when the throttle is fully closed. We
recommend calibrating the TPS to 0.48V when closed. If throttle response is poor when gently stepping on
the gas, it may be necessary to calibrate to 0.49V or 0.5V when the throttle is closed. The center wire on
the wiring harness is the signal wire (as shown in Figure 1 below).
Figure 1: TPS Pinout
Figure 1: TPS Pinout
STEP 6 - (Continued)
You must measure the voltage in this wire (Sig) relative to the ground wire using a multimeter. If the
multimeter has several DC voltage measuring ranges, set it to the lowest range that is higher than 5VDC.
Finding a point to measure the voltage on this wire can be difficult. A pin or wire tap can be used to tap into
the wire so that the signal can be measured. Be careful not to severely damage the wire. Note that it may be
necessary to patch that area with electrical tape if you choose to do this. While common practice is to find a
bare piece of metal in the engine bay to use as a ground for the multimeter, this is not recommended. The
ground wire to the TPS may have a slightly different voltage than the chassis ground. For this reason,
ACUITY recommends also tapping into the TPS’ ground wire to access a ground for the multimeter.
To calibrate the TPS, the sensor must have a 5VDC power supply from the ECU. Do not turn the engine on
as it will not run properly until the TPS has been calibrated. Instead, turn the ignition to the Accessory
position without turning over the engine. This will send power to the sensor, allowing it to be calibrated.
Place the negative voltmeter probe on the tap into the ground wire and the positive voltmeter probe on the
tap into the signal wire. Rotate the TPS until you read 0.48V. Rotating the TPS clockwise will increase
voltage, counterclockwise will decrease voltage.
STEP 7 - Test Drive
After installation, a quick test drive is recommended to inspect throttle response. Throttle response should be
smooth and peppy. Engine RPM should respond very quickly to pedal inputs. If you find a slight lag during
tip-in (the initial movement of the pedal as you depress it), it may be that the closed voltage is too low. In
some vehicles, 0.48V may be too low when the throttle is closed. If this occurs, calibrate the TPS to 0.49V
or 0.50V and repeat the test drive.
STEP 8 - TIGHTEN THE MOUNTING BOLTS
Once you have achieved the desired voltage, tighten the two phillips head bolts. Do not exceed 3N-m (2.2
ft-lbs) of torque on each screw.
This product is eligible for a 1 year warranty against manufacturer defect with valid proof of purchase.
6 Revision History
Date: June 11, 2015
Change: Document Published
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